It certainly wasn't questionable for them to be claiming to be a 501(c)4 LLC Super PAC.
It's also certainly not odd that they no longer claim to be a 501(c)4 LLC.
They mailed in their registration a few days after people started questioning it. You can see all the information about them on the FEC website.
fec.gov/data/committee…
Like how in 2019, they raised $1,325.38 for their PAC and spent $658.35 on tee-shirts.